MalwareUsed by 1 actor

TIDYELF

TIDYELF is malware associated with APT41. The provided content states that TIDYELF loaded the main WINTERLOVE component by injecting it into the iexplore.exe process. This indicates a process-injection capability used to execute or stage another malware component within a legitimate Windows browser process, likely for stealth and defense evasion. High-confidence details available from the content are limited to this behavior and association: TIDYELF is linked to APT41, targets Windows systems, and uses iexplore.exe as the host process for the injected WINTERLOVE payload. No additional infection vector, industry targeting, or indicators of compromise are provided in the source content.

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THREAT ACTORS

Groups observed using it

1 distinct threat actor attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.

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APT41

APT41 malware TIDYELF loaded the main WINTERLOVE component by injecting it into the iexplore.exe process.

via mitre attack websiteattack.mitre.org

MITRE ATT&CK

Techniques & procedures

1 distinct technique documented for this family, organized by ATT&CK tactic.

Privilege Escalation

1 technique

T1055Process InjectionEvidence4

The content repeatedly describes malware and threat actors injecting shellcode, DLLs, or payloads into legitimate processes such as svchost.exe, explorer.exe, iexplore.exe, cmd.exe, lsass.exe, and browser processes.

Stealth

1 technique

T1055Process InjectionEvidence4

ACTIVITY FEED

Recent activity

4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

4 SOURCESView more in app

mitre attack websiteNews

Apr 25, 2023

Process Injection, Technique T1055 - Enterprise | MITRE ATT&CK®

Malware used to inject and load the WINTERLOVE component into iexplore.exe.

mitre attack websiteNews

Aug 7, 2017

Process Injection, Technique T1055 - Enterprise | MITRE ATT&CK®

APT41 malware that injects the WINTERLOVE component into iexplore.exe.

mitre attackNews

Mar 18, 2026

Process Injection, Technique T1055 - Enterprise | MITRE ATT&CK®

Loads its main component (WINTERLOVE) via process injection into iexplore.exe.

mitre attackNews

Mar 18, 2026

Process Injection, Technique T1055 - Enterprise | MITRE ATT&CK®

Malware attributed to APT41 that injects into iexplore.exe to load the WINTERLOVE component.

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Threat actor attribution1

Named campaigns wielding this family, with evidence pinned to each claim.

Exploited vulnerabilities

CVEs this family uses for access and lateral movement.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

MITRE ATT&CK mapping1

Every documented technique, ranked by evidence weight.

Researcher chatter

Reddit, Mastodon, and CTI community discussion around this family.

TIDYELF